http://www.nicovideo.jp/watch/sm5219923 This guy mods his Nintendo DSi and gives it: - a GBA slot - light up buttons - a see-through case - volume/channel sensitive LEDs - MORE LEDs There is a power switch on the side too but I don't know the DSi well, was that there already? Also the guy has no trouble running homebrew on the thing. He's probably sworn to secrecy like all Japanese hackers. I am on linux so I can't hit the print screen button and then paste a screen or two of it into ms paint. You need a Nico Nico account to view the video but it's free.